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help with twitching steppers

Hallestman

help with twitching steppers
July 26, 2013 12:31AM

Registered: 11 years ago
Posts: 15

i am building a prusa mendel i3 with sanguino 1.3a and everything was working perfectly when all the motors decided to stop working. whenever i use the manual controls with repetier host all the motors do is twitch in all directions. they where working fine before. i am using sprinter firmware i just re did all the wiring to see if it was that but it wasn't. Any suggestions? confused smiley

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lajos

Re: help with twitching steppers
July 26, 2013 05:18PM

Registered: 10 years ago
Posts: 180

Is it possible that something happened to your power supply and the motors are not getting enough power? Can you try a different power supply and check that the power cables have good connection?

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Hallestman

Re: help with twitching steppers
July 26, 2013 06:27PM

Registered: 11 years ago
Posts: 15

so i tried a new power supply it was a 250 watt 12volt-14amp and the motors twitched just as much as with the other power supply sad smiley

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lajos

Re: help with twitching steppers
July 29, 2013 06:35PM

Registered: 10 years ago
Posts: 180

Does the hotend heater and thermistor work correctly?

Have you tried a different firmware or at least re-uploading the one you use currently?

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Hallestman

Re: help with twitching steppers
July 30, 2013 03:02PM

Registered: 11 years ago
Posts: 15

the heater and thermistor for both the heat bed and the extruder head both work fine and read 26 degrees Celsius at room temperature. and i have re uploaded the firmware several times and changed some variable i believed caused the problem to no avail. I am using sprinter firmware

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lajos

Re: help with twitching steppers
July 30, 2013 09:04PM

Registered: 10 years ago
Posts: 180

I assume your stepper drivers are good, you mentioned they worked at some point, it would be highly unlikely they all burned out at the same time.

Since you have temperature reading and host communication, your microcontroller should also be fine.

Is it possible that while you were working on the firmware you accidentally modified the pin assignments? Can you try marlin just to see if it works?

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Hallestman

Re: help with twitching steppers
July 31, 2013 10:02AM

Registered: 11 years ago
Posts: 15

YUSS I fixed it! with your help of course. I put a fresh copy of sprinter on and it worked. thank you!